Calculating machine



Oct. 6, 1936. G. LE'RCHV 2,056,579

CALCULATING MACHINE Filed Nov. 13, 1929 INVENTOR Gusfav Lara/2 i I BYFLIE Q: r

A TTORNE Y 45 Figure 3 is a detail of the carry pawl mecha- PatentedOct. 6, 1936 4 2,056,579

UNITED STATES PATENT OFFICE 2.058.519

oucum'rmo momma:

Gustav Lerch, Oakland, Calif., assignmto Marchant Calculating MachineCompany, a corporation of California Application November 13, 1929,Serial No. 406,840

7 Claims. (Cl. 235-138) The present invention relates to calculatinggears 4" into mesh with either of constantly machines, and particularlyto tens-carry mechameshed gears H5 or 4", which are mounted on nismtherefor. This carry mechanism is of the shafts M6 and 8, respectively,said shafts betype in which an independent actuator operates ingiournaled in the side frames or the machine.

l the various numeral wheels successively in as- The gear 5 is adaptedto be driven by the ac- 5 cending order, and is especially designed fora tuating elements carried on shaft 300, which is type of calculatingmachine in'which the diflerenalways rotated in the direction indicatedby the tial actuators for the numeral wheels operate in arrow inFigure 1. Both the gears 4|! and 4|! one direction only, the numeralwheels being reare always rotated an equal amount in opposite 1oversible by means of reversing gears disposed directions, and thedirection of the drive of nu- 10 in the train between such numeralwheels and meral wheel 4 will depend upon which 01' these suchdiflerential actuators. According to the gears is engaged by reversinggear 3. present invention, the carry actuator is also ro- Any suitabletype of differential actuator may tatable in one direction only, and thesame rebe used herein, such as, for inst th t di versing mechanism whichis used to reverse the closed in the patent to Friden No. 1,643,710dated 15 direction otdifierential operation of the numeral September 27,1927, such an actuating segment wheels is used to reverse the directionof their being shown at 302.

. operation in carrying. The carrying mechanism is operated when- It isan object of the present invention to proever any numeral wheel movesfrom its nine to its go vide an improved tens-carrying mechanism forzero position, or vice versa, and comprises a car- In calculatingmachines. rying pawl 420 having a laterally projecting por- It is anobject of the present invention to protion 42! adapted to seat betweentwo teeth of vide a common reversing mechanism operable the gear 4l5associated with the numeral wheel both in digitation and in carrying torevers th or the next higher order. The pawl 420 is pivoted 2:; di ectio0 Op a o numeral WheBlS by a at 422 to .a carry latch 423 having a nose424 unactuator which is operated in one direction only. derlying thetail of carrying lever 425 pivoted on It is an O j of h present nv i toshaft 428, and resiliently supported adjacent a vide such mechanism in amachine in which the u ral wh e], Carrying pawl 42a i provided numeralwheels are capable of ordinalshift relawith a laterally projecting lugon the upper tive to their actuator. portion thereof which limits thecounter-clock- 30 It is an Object of the Present invention t0 D wiseoscillation of said,,pawl by engagement with vide a carry mechanismwhich will be restored, carry l t h 42:, The carrying lever 42; is prora y for further operations. by it Operation in vided with a struck outlug 42! adapted to co- -carrying. operate with a complementary luggedannulus Other objects of the invention will appear as 423 apprdpflatelypositioned on th numeral 3:5

the description progresses. wheel.

An example 01 the machine embodying the ing Th normal position of thcarry mechanism vention is described in the accomp yi speciis shown inFigure 1. When the numeral wheel flcation and in the drawing fo i a Ptheremoves from nine to zero, or vice versa, the lugged 4o 01', inwhich:'- annulus 428 cams the lever 425 down, moving the 40 Fi ure 1 isa sectional view of the assembled latch 42: to the position shown inFigure 2. Latch mechanism. 1 423 is held in this position by the springpressed Figure 2 is a sectioned detail showing the carry ball 9' whichcooperates with notches in the p in carrying Position latching member423 for this purpose. Carrying lever 425 being constantly spring urgedupward.. n S 1 ly, lug 421 is maintained in engagement with Figure-4 isa plan of the mechanism shown in Figure 1 with the casing removed.lugged annulus 428. The oscillation of carrying ecarria e 400 isslidably mounted in atracklever by the mg on the annulus occurs wgsnaan: provides a mounting for shaft m tween the 0 d 9 positions or enumeral carrying paced numeral wheels 4 Fixed t wheel, said lever beingin its normal upper posieach numeral wheel is a wide pinion 4l2 meshtionwhen the numeral wheel displays either of ing with a reversing gear 3mounted on shaft said numbers so that it does not interfere with H4; Theshaft 4| 41s also mounted in the carlateral shifting oi. the carriagein, which it is u riage 400, and is laterally shiitable to carry themounted and may be moved into cooperation latches Q23. v

Carry actuating discs see are fixed to the actuator shaft are forrotation therewith. The pe-= riphery of these discs is notched at 533,which is opposite pawl ilt at full cycle position, to permit reset ofthe numeral wheels, but in all other site the tail of pawl 4322b, andany pawls which are moved to the rear by the passage of their. numeralwheels between zero and nine ride in this cut-out portion until theportion of the cycle in which carrying takes place. When at the end ofdieitation in each order the end use of the cut-out portion est strikesthe tail of pawl era, the pawl is first rotated on its axis i322 untilthe portion ell thereof strikes the bottom or its as= sociated toothnotch and the pawl and its asso ciated latch 323 are thenrotated as aunit on the axis s l 6, carrying with them the gear 6 i e to rotate thenumeral wheel of the next higher order through one increment. Thedirection of this rotation will be determined by the setting of thereversing gear l! 3, and will be the same as in the immediatelypreceding digitation cycle. The car rying operation also acts to restoreall the parts of the carrying mechanism to their normal position, incondition for future carrying operations.

The operating edges @32 of discs use are reia= tively staggered aroundthe periphery of shaft no to permitsumclent time for the properpositioning of any pawl dfiil which is tripped back,

- not in a digitation cycle, but as the result of a carrying operationin e. lower order, before it is operated by its edge $32.

Since the carriage see, as hereinbeiore set forth, .is shiftablerelatively to the several orders of the actuator, means are providedwhich at the same time center the separable trains of gears ing andprevent their overthrowing in operation, thus insuring that they willmesh accurately when the carriage is shifted. The stationary train ofgearing in each order comprises gears M5 and All mounted on shafts M6and M8, respectively, hereinbefore described as being iournaled in thestationary part of the machine. The displace= able train of gearing ineach order comprises the gears M2 and M3 which are mounted on shafts4,50 and 454, respectively, suitably supported in the displaceablecarriage 5.68. As the carriage 408 is shifted, gear M3 is moved intooperative relation with the various orders of stationary gearing M5 andM7. A pawl 638 pivoted on shaft 426 is pressed against the gear onassociated with the numeral wheels by a spring pressed ball carried inbar 43? which may be rocked to release the spring pressure from Spawl835 as fully described in the British patent to Fiiden, No. 272,174,accepted February 23d, 1928, whilethe stationary trains of gearing arecentered bye spring pressed pawl 435, the nose of which rides betweenthe teeth of gear or,

4 aosaeve with a plurality or laterally stationary carry While thepreferred construction has been described in the foregoingspecification, it is understood that the invention is capable ofmodirlcation within the scope or the following claims.

I claim:

1. In a machine oi the class described, a plu rality' of reversibleaccumulator elements, tens carrying mechanism, means controlled by anaccumulator element upon movement in either direction for displacingsaid mechanism from normal position, means for restoring said mechanismto normal position, means operable as an inci-= dent to the operation ofsaid last named meansfcr operating and loci-ring an accumulator element,and means for reversing the direction of oeeration' of'said elements bysaid mechanism, 2. In a register mechanism, numeral wheels, individualdriving trains therefor, a pawl assoole-ted with one of the gears oileach of said trains, means positively operated by a numeral wheel ateolgear, and means for moving said pawl to drive its associated gear andthereafter loch said gear and numeral wheel.

3. In a calculating machine, reversible accum ulator elements, carrymembers operable in one direction by movement of said accumulatorelements in either direction and in the other direc tion to operate saidelements, andmeans for reversing the directionol operation of saidelements by said members.

l. In a calculating machine, reversible accumulator elements, carrymembers operable in one direction by movement oi said accumulatorelements in either direction and operable to operate said elementsduring restoration to normal posi tion, and means for reversing thedirection of operation of said elements by said members.

5. In a'caloulating machine, reversible accum= ulator elements, carrymembers associated there with, operable positively in one direction uponmovement of said accumulator elements in either direction means foroperating said members in the other direction to first operate and thenmaintain said elements locked, and means for reversing the direction ofoperation of said elements by said members.

6. In a calculating machine. accumulator ele ments, pawling mechanismsfor operating said elements in carrying operations, means positivelyoperated by said elements to displace individual pawling mechanismspreparatory to a carrying operation, and means for returning displacedpawling mechanisms to normal position to eflect carrying and to look allsaid mechanisms, thereby locmng said elements.

7. In a calculating machine, reversibly oper able accumulator elements,carrying mechanisms settable by operation of said elements in either tomove said pawl independently of its assccidirection, means for restoringsaid mechanisms GUSTAV LERC'H.

